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someonenotyou replied to ASUS X509FAC no power to board

in Troubleshooting Laptops, Tablets, and Mobile Devices

Yesterday, 03:24 AM
Thank you so much.
Yes, it was the DC Jack, and the pin did not get grounded. The pin supposed to touch the barrel of the charger, was too straight and dirty.
Also, the correct pin was under the circled one. P_A/D_IN_DETECT
[URL=filedata/fetch?id=3654713&d=1749374417][ATTACH=JSON]{"alt":"Click image for larger version Name:\tp_ad_in_detect.png Views:\t0 Size:\t64.8 KB ID:\t3654713","data-align":"none","data-attachmentid":"3654713","data-size":"medium"}[/ATTACH][/URL]

So, I desoldered...

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someonenotyou replied to ASUS X509FAC no power to board

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-07-2025, 11:56 AM
AC_BAT_SYS to GND has a resistance of 5.5MOhm.

Here are the requested pictures. If you need anything else, please ask.

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654358}[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654357}[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654355}[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654356}[/ATTACH]...

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someonenotyou replied to ASUS X509FAC no power to board

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-07-2025, 02:04 AM
On PR8904 (RES 127K OHM 1/16W (0402) 1%//TA-I/RM04FTN1273) I measured this:
Pin 1 A/D_DOCK_IN - 19.77V
Pin 2 P_CHG_ACDET_10 - 0.671V

Here are pictures. The best I could make:

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654005}[/ATTACH]

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3654004}[/ATTACH]On PR8904 (RES 127K OHM 1/16W (0402) 1%//TA-I/RM04FTN1273) I measured this:
Pin 1 A/D_DOCK_IN...

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someonenotyou started a topic ASUS X509FAC no power to board

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-05-2025, 11:26 AM
ASUS X509FAC no power to board

Hi.

I have an ASUS X509FAC with no power going to the board.

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3652999}[/ATTACH]

19V gets from DC Jack to PQ8901 and PC8915 but not further (PC8915 should switch on the PQ8901, correct?)
But, after PQ8902 I get 3.2V on AC_BAT_SYS.

I am at loss, as I cannot find any shorts and don`t know where else to look.
Any suggestions, please?

Thank you.Hi.

I have an ASUS X509FAC with no power going...

Need asus x509fac motherboard schematic - Badcaps

https://www.badcaps.net

Hi, I need asus x415 (x509fac motherboard) schematic or boardview pls

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someonenotyou replied to Need asus x509fac motherboard schematic

in Schematic Requests ONLY!

06-05-2025, 11:08 AM
Schematic...

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someonenotyou replied to I need Asus X541UV IT8995E kbc bios

in BIOS Requests ONLY!

06-05-2025, 08:56 AM
Sorry from bringing up this old post, but would it even program itself if there is no EC region in the UEFI?...

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someonenotyou started a topic Lenovo ideapad 100-15 NM-A681 disable dGPU

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-20-2025, 12:30 PM
Lenovo ideapad 100-15 NM-A681 disable dGPU

Hi.

I have a Lenovo ideapad 100-15 with probably bad dGPU.
I tried to disable it by desoldering inductors going to dGPU.

I desoldered 2 inductors (PL705 and L706) going to +VGA_CORE
And 1 inductor (PL701) going to 1_05VS_LX.

Is there anything else I need to desolder?

If the PL701 is in place, I get fan spin at start, but nothing on the screen, no POST.
If PL701 is desoldered, there is no fan spin, but LCD gets powered on (without backlight), but no POST.

I have attached link to boardview and schematics.
...

lenovo ideapad 100 NM-A681 Schematic and BVD - Badcaps

https://www.badcaps.net

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someonenotyou replied to Lenovo ThinkBook G2 ARE- how to diagnose on/off

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-11-2025, 01:10 PM
It seems, that I found the problem - water damage on external board, where power button is. There were some corrosion on pins going to power button.
Maybe with temperature change it short the power button and switched te laptop off.

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someonenotyou started a topic Lenovo ThinkBook G2 ARE- how to diagnose on/off

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-10-2025, 07:45 AM
Lenovo ThinkBook G2 ARE- how to diagnose on/off

Hi.

I have a laptop Lenovo ThinkBook G2 ARE, which is switching on and after 3 seconds off (Esc, Caps Lock and Num Lock key lights on)?

After leaving it to sit for few days, it would work for 1 hour, then it would switch off.
When switched on again, it would get to Windows boot screen and switch off.
After 3 times like this, it would just light up Esc, Caps and Num lights on keyboard and switch off after 3 seconds without anything on screen.

I have tried a different BIOS, disable on-board RAM with the script, and reflow the RAM chips. Nothing...

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someonenotyou replied to Lenovo A485/T480 USB stops working when USB2.0 is plugged.

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-22-2025, 04:08 PM
Yeah, voltage injection is out of question. CPU still works, and there are no other components that could be faulty....

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someonenotyou replied to Lenovo A485/T480 USB stops working when USB2.0 is plugged.

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-21-2025, 11:15 AM
Thank you for reply.

Made the measurements:

D4058 Pin 1 > L74 Pin 1 = 0ohm
L74 Pin 1 > L74 Pin 2 = O.L
L74 Pin 2 > GND = 2ohm

Anyway, I removed the TVS, but still no changes.

All this started to happen after BIOS update (according to my colleague) ...

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someonenotyou replied to Lenovo A485/T480 USB stops working when USB2.0 is plugged.

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-21-2025, 10:38 AM
I finally received 1.8V conversion board and flashed a different BIOS. Still no changes.

Board - Lenovo A485 NM-B711

I started to test resistance on USB 2.0 D+ and D- pins. Almost all of them had 0,6Mohm resistance, except D- line going to a USB C port, which had only 2ohm resistance.
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3619928}[/ATTACH]
I desoldered the L74 component, but the 2ohm resistance still remained. And the line goes straight to CPU.
Does that mean the USB...

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someonenotyou replied to Lenovo V15 G3 ABA

in BIOS Requests ONLY!

04-15-2025, 01:26 AM
Hi.
Could I get, please, admin password removed from the BIOS?
Lenovo V15 G3 ABA
S/N - PF46WRGZ

I tried the BIOS user Rebirth uploaded, but I got error when saving BIOS settings - Failed to save storage: AmdSetup. Status: Write Protected.

Thank you....

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someonenotyou started a topic Lenovo A485/T480 USB stops working when USB2.0 is plugged.

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-19-2025, 12:15 PM
Lenovo A485/T480 USB stops working when USB2.0 is plugged.

Hi.

I have 2 Lenovo laptops (A485 and T480) with identical USB problem.
When I plug in a USB 3.x device (USB storage), the USB ports are working normal.
But as soon I plug in USB 2.0 device (mouse, USB storage), all the USB ports stop working. Even if I plug in USB 3.x device.

The only way to get USB working again is disconnect battery and reset BIOS.

Has anyone had anything similar?
I have not yet tried another BIOS, but would that be the problem with USB?

Thank you.

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someonenotyou started a topic SY8003 instead of SY8003A

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-05-2025, 07:54 AM
SY8003 instead of SY8003A

Hi.

I have a Lenovo HLS1C_HLS1D LA-L502P board with bad SY8003A DC/DC converter.
I have a different mother board witch contains SY8003 DC/DC converter.

Can I use SY8003 instead of SY8003A converter?

These are the differences -[LIST][*][B]Short Circuit Protection[/B]:[LIST][*][B]SY8003[/B]: Uses latch-off protection. This means that when a short circuit is detected, the device will shut down and remain off until it is manually reset.[*][B]SY8003A[/B]: Uses hiccup mode protection. In this mode, the device will repeatedly attempt to restart after a short...

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someonenotyou started a topic How to transfer information from one BIOS to another?

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-04-2025, 03:41 AM
How to transfer information from one BIOS to another?

Hi.
I am starting to learn about UEFI BIOS.
At the moment I have Lenovo laptop with bad BIOS.
I tried to clean ME region and transfer EC region from a known working BIOS, but the laptop does not POST (just fan spin).
So there is something else bad.
If I flash a know working BIOS, the laptop POSTs and boots into Windows.
But the problem is, that the serial numbers, Windows key, and every thing else is from another laptop.

Where do I start to transfer the S/N, Windows key and other information from one BIOS to another?

Thank y...

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someonenotyou replied to HP 250 G8 EC cannot reach BIOS

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-28-2025, 02:43 PM
The SYS_PWROK still has 3.3V present, but 1.2V line is still shorted.
I opened PJM2 jumper, and short was gone from PUM1 controller, but still present going to RAM slots and CPU.
I inspected RAM slots and everything seemed fine. But I did resolder all the PINs. Still shorted....

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someonenotyou replied to HP 250 G8 EC cannot reach BIOS

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-26-2025, 04:00 AM
PLT_RST to ground - 70k Ohm

Today I went through the voltages again and I noticed the board was missing 1.2V.
Then I found that there was a short on 1.2V line (0.0 Ohm).

[URL=filedata/fetch?id=3581614&d=1740563221][ATTACH=JSON]{"alt":"Click image for larger version Name:\tHP_250_G8.png Views:\t0 Size:\t519.5 KB ID:\t3581614","data-align":"none","data-attachmentid":"3581614","data-size":"thumb"}[/ATTACH][/URL]
1. Where I noticed the short.
2. I removed the PUM1 controller...

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someonenotyou replied to Dell Vostro 3501 - no signs of life after BIOS read

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 06:00 AM
I did some more measurements on the startup sequence:
[ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3580712}[/ATTACH]
It seems that everything stops at SIO_SLP_S4# where PCH sends enable signal for 2.5V. When I press power button, my multimeter does not register anything.
Where should I look now?I did some more measurements on the startup sequence:
[ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3580712}[/ATTACH]
...

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someonenotyou replied to Dell Vostro 3501 - no signs of life after BIOS read

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-17-2025, 04:36 AM
I got these measurements:
1-2-3 - 19.83V
4 - 24.51V
5-6-7-8 - 19.83V...

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